215125243445 has 48 divisors (see below), whose sum is σ = 313540347648. Its totient is φ = 138776924160.

The previous prime is 215125243423. The next prime is 215125243451. The reversal of 215125243445 is 544342521512.

It is not a de Polignac number, because 215125243445 - 2⁶ = 215125243381 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215125243399 and 215125243408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46132184 + ... + 46136846.

It is an arithmetic number, because the mean of its divisors is an integer number (6532090576).

Almost surely, 2^215125243445 is an apocalyptic number.

It is an amenable number.

215125243445 is a deficient number, since it is larger than the sum of its proper divisors (98415104203).

215125243445 is a wasteful number, since it uses less digits than its factorization.

215125243445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9270 (or 9253 counting only the distinct ones).

The product of its digits is 192000, while the sum is 38.

Adding to 215125243445 its reverse (544342521512), we get a palindrome (759467764957).

The spelling of 215125243445 in words is "two hundred fifteen billion, one hundred twenty-five million, two hundred forty-three thousand, four hundred forty-five".